From 34a5bbdacbb5c5dbabe8674289020979b6300104 Mon Sep 17 00:00:00 2001
From: Sanchayan Maity <sanchayan@sanchayanmaity.net>
Date: Mon, 6 Mar 2023 22:05:55 +0530
Subject: [PATCH] nvim: after/ftplugin/cabal: Enable HLS on cabal files

Enabling HLS on cabal files allows us to format them using gq. HLS
just uses the internal cabal-fmt plugin.
https://haskell-language-server.readthedocs.io/en/latest/features.html#formatting
---
 nvim/.config/nvim/after/ftplugin/cabal.lua | 4 ++++
 nvim/.config/nvim/lua/lsp-utils.lua        | 7 ++++++-
 2 files changed, 10 insertions(+), 1 deletion(-)
 create mode 100644 nvim/.config/nvim/after/ftplugin/cabal.lua

diff --git a/nvim/.config/nvim/after/ftplugin/cabal.lua b/nvim/.config/nvim/after/ftplugin/cabal.lua
new file mode 100644
index 0000000..d0573c7
--- /dev/null
+++ b/nvim/.config/nvim/after/ftplugin/cabal.lua
@@ -0,0 +1,4 @@
+local lsp_utils  = require('lsp-utils')
+local hls_config = lsp_utils.hls_config()
+
+vim.lsp.start(hls_config)
diff --git a/nvim/.config/nvim/lua/lsp-utils.lua b/nvim/.config/nvim/lua/lsp-utils.lua
index 20e7a91..251a820 100644
--- a/nvim/.config/nvim/lua/lsp-utils.lua
+++ b/nvim/.config/nvim/lua/lsp-utils.lua
@@ -177,7 +177,12 @@ function M.hls_config()
     root_dir            = root_directory,
     filetypes           = { 'haskell' },
     single_file_support = true,
-    settings            = { haskell = { formattingProvider = 'ormolu' } },
+    settings            = {
+      haskell = {
+        formattingProvider      = 'ormolu'  ,
+        cabalFormattingProvider = 'cabalfmt',
+      }
+    },
   }
 end